/* Copyright (c) 2008, The Visigoth Software Society
 * Copyright (c) 2006, Sun Microsystems Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notices,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name Visigoth Software Society, FreeCC, Sun Microsystems, Inc. 
 *       nor the names of any contributors may be used to endorse or promote 
 *       products derived from this software without specific prior written 
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.visigoths.freecc.lexgen;

import org.visigoths.freecc.Grammar;
import org.visigoths.freecc.FreeCCNode;

/**
 * Describes character range descriptors in a character list.
 */

public class CharacterRange extends FreeCCNode {

  /**
   * The line and column number of the construct that corresponds
   * most closely to this node.
   */
  int line, column;

  /**
   * The leftmost and the rightmost characters in this character range.
   */
  public char left, right;

  public CharacterRange(Grammar grammar) {
    super(grammar);
  }

  public CharacterRange(Grammar grammar, char l, char r) {
     super(grammar);
     if (l > r)
        grammar.addSemanticError(this, 
                "Invalid range : \"" + (int)l + "\" - \"" + (int)r + "\". First character shoud be less than or equal to the second one in a range.");

     left = l;
     right = r;
  }
}
